Josef jergle



(No Model.)

J. JERGLE.

ELECTRIC ARC LAMP.

Patented July 11, 1893.

g I o '1 [M I. O i O eaves ,Zhue/don' UNITED STATES PATENT OFFICE.

JOSEF JERGLE, OF VIENNA, AUSTRIA-HUNGARY.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 501,074, dated July 11, 1893.

Application filed November 25, 1891. Serial No. 418,150. (No modeL) Patented in France April 28, l89l l No. 210,995, and in Austria-Hungary $eptemher 23, 1891. No. 17,294 and No. 40,851.

To all whom it may concern.-

Be it known that I, JOSEF JERGLE, electrician, a subject of the Emperor of Austria- Hungary, residing at 37 Mariahilfer Strasse, Vienna, Austria-Hungary, have invented a certain new and useful Improved Friction Coupling for the Carbon-Feed Mechanism of Electric-Arc Lamps, (for which I have obtained patents in the following countries: Austria-lEIungary, No. 17,294: and No. 40,851, dated September 23, 1891, and France, No. 210,995, dated April 28, 1891,) of which the following is a full, clear, and exact specification.

This invention relates to an improved friction coupling for the carbon feed mechanism of electric arc lamps the object of which is to retain the tips of the carbons of electric arc lamps at a uniform distance from each other so long as the carbons are being operated for producing electric light or in, other words to regulate the position, of the one carbon to the other. No alteration in the construction of the existing arc lamps is requisite for applying my invention to the same it being immaterial whether the current employed is uniform or alternating.

The accompanying drawings represent the upper part of an arc lamp with the carbon feed mechanism, Figure 1 being a top view or plan; Fig. 2 an elevation partly in sec tion. Figs. 3 and4t are details.

The armature a is attracted by the appropriately arranged shunt electro magnet s n as soon as the distance between the two carbons in consequence of their combustion has been so increased that the resistance between the same hasbecome so great that the electro magnet s n in the derived circuit Z ZZ between the two terminals 70 k is excited. This attraction is continued until the derived current is interrupted by breaking the contact at c whereupon the springf of the armature a returns to its position of rest. The armature a is rigidly attached to the piece of metal m, arranged loosely on the diskt and embracing the rotary bolt or spindle b so that the same is pressed by means of a screw nut i with sufficient force onto the disk 25 in order that when the hinderance is not excessive the disk t and with it the rotary spindle b will be caused to follow the movement of the armature. A recess a: 0n the inferior side of the piece of metal m (Figs. 3 and 4) forms in combination with the periphery of the disk 25 a slightly conical space into which africtional body r (disk, roller ball or their equivalent) is so pressed by a springf that the said body is simultaneously in contact with the surface of the recess a: in the piece of metal on and the periphery of the disk t. A like frictional body '1" is arranged in corresponding manner and is pressed by a springf into contact with the disk t and apiece of metal m. The lower part 9 of the rotary spindle Z) of the disk 25 is provided with screw threads of desired pitch and can turn free in a slotted shell (1. The carrier of the carbon holder at glides on the said shell (1 and a second shell or case (1' and carries an open nut .2 arranged on a suitable spring, said nut gearing into the threads of the spindle g and can when withdrawn by means of the handle 9 glide free on the said spindle g and can be thus readily drawn down and fixed at any desired point.

The operation of the device is as follows: Every time the armature d is attracted by the electro magnet s n in the derived circuit Z Z Z, the disk t has the tendency to turn and follow the movement of the armature a but is prevented from doing so by the friction caused by the friction body r. If the derived current is interrupted by breaking the contact at c and the armature a brought out of its position of rest by the springf, the frictional contact of the roller 0* with the disk t will cause the latter and also the rotary bolt and threaded spindle g to rotate and thus effect the movement of the nut z and the carbon carrier 91 a distance downward corresponding to the rotation of the said spindle g.

The object of the frictional body 7" is to prevent all retrograde rotation of the spindle g when the armature a is attracted.

Having now particularly described and as certained the nature of my said invention to the lever, and a pair of roller clutches each and the manner in which the same is to he of which under the action of the shunt magperf0r1ned,I declare that What I claim is netand its armature is adapted to alternately In an arc lamp, the combination with a engage and disengage the disk to rotate it.

5 cross-head carrying the positive carbon of a In Witness whereof I hereunto set my hand 15 vertical screw threaded rod engaging an open in presence of two Witnesses. nut on the cross-head, a horizontal disk on JOSEF JERGLE. the upper end of the rod, actuated by a step- Witnesses: by-step feed consisting of an armature lever A. SCHLESSING,

I0 pivoted on the rod, a shunt magnet parallel JOSEF ZENCTEN. 

